Printing press



Jan. 29, 1929.

C. G. PRITCHARD PRINTING PRESS 4 Sheets-Sheet 1 Filed Dec. 21, 1926 awueutoz 62/1 6 IDIWZI/AIM Jan. 29, 1929. 1,700,139

C. G. PRITCHARD PRINTING PRESS Filed Dec. 21. 1926 4 Sheets-$hee 2 Jafi. 29, 1929.

' 1,700,139 C. G. PRITCHARD PRINTING PRESS Filed Dec. 21, 1926 4 Sheets-Sheet Qwomtoz 0m 6 firm/1M0 Jan. 29, 1929.

C. G. PRITCHARD PRINTING PRESS 4 Sheets-Sheet 4 Filed Dec. 21, 1926 iii latented Jan.

, "41 1 ,139 UNITED"STATES'TPATENT OFFICE.

cam. e. rnrrcmnn, or amen 0310, nssrenon, BY unsmi Assromn'rs, 'ro

nnnars-smotn-ro'rrna country, or -ctnvar.mn, OHIO, a oonromrrrou or DELAWARE.

i PRINTING PBEQS.

Application filed Iieeember 21, 1826. SeriatH No. 166,127.

My invention relates particularly to a web printing-press and more es ecially to web rotary presses for lithograp ic printing by offset impression v The objects of my invention are, among other things,-to provide an improved rotary press of this type for printing upon both sides of the web of paper or other impressionreceiving material operable in combination with any suitable delivery for the perfected webwhich may embody sheet-cuttingdevlces and a folder whereby when the impression is thrown off the press the forward feed of the web maybe simultaneously stopped through the press and delivery to enable the printing and olfset cylinders to be run to get up color while the sheet-cutting and folding mechanijsms may continue in operation, but without forwarding the web through the press and without printing on such web which is held stationary in the pressand delivery while the web-cutters and folder continue in operation. A. further object is to provide for moving and arranging the different parts ofthe web delivery in connection with the stoppage of the forward feed of the web so that the different functions may be performed without disarranging the press and delivery elements or interfering with the threaded web. A further featurev is to provide improved vveb feeding and stopping devices actuated in. unison by the tripping of the press so that the web stopping devices are timed to come into operation slightly before the web-feeding mechanism shall release its pulling hold on the web to end the forward feeding. During this "interval the web stopping devices will automatically permit the web held thereby to have a slight forward movement until the complete stoppage of the web talges place, but will effectually prevent any backward run of such web wherebyany crumpling or tearing of such part'of the web in the delivery is avoided. In like manner when the web-forwarding mechanism'is brought back into operation along with the restoration of impression on the press, the web-stopping devices still in contact with the web do not in any way hinder the further advancement of the web through the press with theresumption of the printing and delivery of the web tothe cutters.

With these and other objects in View, my invention comprises the constructions and operating arts forming the press and delivery mec anisms herein shown and hereafter, to be described as one embodiment of my invention, such other features being fully i and specifically set forth in the appended claims.

on one side and a third color on the other side of the web, the same serving to ex lain the invention which is notrestricted, 0w.-. ever, to any particular form or type of print- Fig. 4 is a side elevation of Fi 3 with the parts shown when the press has een tripped and the web held stationary with the webfeeding mechanism out of operation; Figs. 5 and 6 are detail views of the rockarms for the web-stopping and web-forwarding devices; Figs. 7 and 8 are detail views of the webstopping roller and operating mechanism therefor; and

Fig. 9 is a diagrammatic side elevation of a web offset press embodying three printing The accompanying drawings show this embodiment of my invention 1n connection with a web ofi'set press printing two colors couples and delivery provided with my improvements operable in conjunction with a folder and end delivery to carry off the folded sheets.

Similar numerals refer to "similar parts throughout the several figures.

Referring to Figs. 1-4, the side-frames 10- and 11 of the delivery have journalled therein the shafts 12 and 13 which carry the cutting cylinders 14 and 15 respectively in which are ailixed the transverse coacting cutting knives 16 and 17 for severing the web W into sheets. The cylinders 14 and 15 are driven in unison by the intermeshing gears 18 and 19 keyed to the shafts 12 and 13 respectively, (Fig. 1).

The shaft 12 is driven by the bevel gear 20 attached to this shaft-which gear 20' engages the bracket 23- secured to the side-frame 10.

The web W is drawn forwardly in the direction of the arrows or advanced through the" delivery-by the forward n roller 24 mounted on the shaft 25 journalled in the side-frames 10 and 11 as shown in Figs. 1 and 3. The. shaft 25 carries the pinion 26 meshing with the idler gear 27 mounted on the stub-shaft 28 journalled in the side-frame 10' which gear 27 engages with the gear 18 mounted on the shaft 12. By this mechanism the for-- warding roller 24 for pulling the web W forwardly is rotated in the same direction and at the same peripheral speed as the cutting cylinders 14 and 15. Coacting with the webforwarding roller 24 are two spaced-apart drop rollers 28 and 29 (Fig; 3), which when pressing the web W against the roller 24 as shown in Fig. 1 cause the web to be pulled by the roller 24 to advance same through the delivery as shown in Fig. 1.

The drop rollers 28 and 29 are pinned to the lower ends of the rocklevers 30 and 31 'ournalled on the rock-shaft 32 journalled' 111 the side-frames 10 and 11 (Figs. 1, 3 and 4). Keyed to the shaft 32 on either side of the rock-levers 30 and 31 are the vertical forked brackets 33 and 34 respectively having the interiorly threaded bloc s 35 and 36 at their up er ends. The upper ends 37 and 38 of the rec -levers.30 and 31 have bores cut therein through which pass the adjustable screw bolts 39 and 40 with their inner threaded ends coacting with the threaded blocks 35 and 36 respectivel carried by the brackets 33 and 34. Coile about the bolts'39 and 40 betweenthe blocks 35, 36 and lever ends-37 and 38.are the helical springs 41 and 42" by which the pressure of thedrop rollers 28 and 29 on the web-forwarding roller 24 may be properly adjusted for diflerent grades of paper stock by turning the knurled caps 43 and 44 affixed to the outer ends of the screw-bolts 39 and 40. The springs 41 and 42 also serve through their variably regulated tension to control the timing of the coaction of the dro rollers 28* and 29' with the web W and their movement therefrom. A lost motion connection is provided between the arms 33, 34 and the arms 37, 38 by adjusting the screw-bolts 39, 40 whereby a space is provided between the reduced portion of the knurled heads 43, 44 and their respective arms 37, 38 (Fig. 1 showin such construction only as to the arm 37 an head 43). The rock-shaft 32 is actuated by the. rock-arm 45 keyed to the shaft. 32 whichcarries in its outer end the tubular housing 46 (Fig.6). Passingthrough against the bottom of the cylindrical bore cut in the housing 46. The pin plug end 51 is adapted to engage either the upper hole 52 or lower hole 53 formedin theface-plate 54 of a the rock-arm 55 journalled on the rock-shaft 32. By this mechanism the drop rollers 28 and 29 may be placed in operative position against the web W as shown in Fig. l w'ith the upper hole 52 engaged by the plug end 51, or the drop rollers 28 and 29 may be swung away, and held in me erative position with respect to the forwarding roller 24 by lowering the rock-arm 45 so that the plug end 51 shall slip into and engage the lower hole 53 when the drop rollers 28 and 29 clear the web in all'positions of the rock-levers30 and 31. The pin 47 carries the knurled cap 56 (Figs. 5. and 6) so that the pin 47 may be properly manipulated to shift the plug end 51 from either hole 52 or 53 to the other as required. r v

' As shown in Figs-1 and 4,. the web'W passes upwardly from the press (Fig. 9) in the direction of the arrows overv the compensating roller 57 by which, the tension of the webW as it passes through the delivery is regulated. This roller 57 is pivoted to the end of the rock arm 58 aflixed to-the. shaft 59 journalled in the side-frames 10 and 11. Keyed to the shaft 59 is the rock-arm .60 hav ing the interiorly threaded block 61 aflixed thereto. .Engaging the threaded block .61 is the threaded tip 62 ofthe rotatable rod 63 journalled in the bracket 64 and operated by the handle 65 aflixed t9 the lower end. By this mechanism the operatorv may. suitably adjust the tension ofthe web W by shifting Q the positionof the roller 57 in rotating the rod 63 through the block 61 in either-direction.-

tiv y in, which is journalled the cross-shaft 68 can ing the idler roller 69 over which the web asses before its downward runthrough t e web-forwarding devices hereinbefore described. *One'end of the shaft 68 carries the ratchet 70'which is adapted to be engaged b the pawl .71'pivoted to the up- 125 right brac et 72 which is a continuation of the bearing 67. When the press is in operation the pawl 71 is held out, of enga ement with the ratchet 70 by the control isk 73 (Fig. 1) ,journalled onthe shaft 68, thereby 0 g When the web-forwarding devices compermitting the web W in its forward travel to run'freely over the roller 69 without any noise from the awl 71'dropping over the teeth of the ratchet 70. Coactm with idler the rock-levers 76 and 77 have vertical bores cut therein through which pass the adjust-- able screw-bolts 87, and 88, with their threaded ends coacting with the threaded blocks 83 and 84 respectively of the brackets 81 and 82 (Figs.- 1 and 3'). Coiled aboutthe bolts 87 and 88 between the blocks 83 and 84 and lever ends 85 and 86 are the helical springs 89 and 90 by which the pressure of "the lock-wheels 7 4 and 75 on the idler rollers6'9 and the timing of the movement of such lock-wheels against the. web .W ma be suitably regulated by turning the knurle ca s 91 and 92 afiixed to the'tops of the screw-ho ts 87 and' 88. The rock-shaft 78 is'ac tuated by the rock-arm 93 keyed to such shaft and the outer end of the rock arm 93- carries the" tubular housing, 94 (Fig. 6). Passing through' the cylindrical bore of the housing '94 is the slidable pin 95 having coiled about its shank 96 within the housing bore the helical s ring 97 one end of which bears on the shoul er 98 encircling the base 99 of the plug end 100, while the other end of spring 97 bears against the bottom of the housing bore (Fig. 6). The pin plug end 100 is adapted toengage eltherthe upper I hole 101 or lower hole 102 cut. in the face plate F 103 of the rock-arm 104 journalled on: the rock-shaft 78. By this mechanism the lock wheels 74 and 75-ma be placed in o rative position with the i ler roller 69 ig. 4) when the lower .hole 102.is engaged by the plug-end. 100 or the lock wheels 74 and 7.5.

may be shifted and lifted to inoperative position even when the press is tripped (Fig. 4:), by having the plug end 100 engage the upper hole 101. The pin 95 carries the knurled cap. 105 (Figs-2 and 3) by which-the pin 95 may. be properly manipulated to shi} e plu fend- .100 from either hole 101 or 102 eet t e requir'ementsof proper operation.

The ti 'f'the rock-armsconnecte by the link 106 and the rock-arm 106? is also connected to the arm 107 of'the control disk 73 by the link 108. The rod 109 pinned to the rock-arm 55'is connected with the thro'w-ofimechanismof the press shown in Fi therein shown in more or less diagrammatic roller 69 are two spaced-apart -wheels 74 .pression cylinder K and bevel gear 114 'afiixed I off and throw-on mechanisms to trip or on the rave it appears on.

and 104 are- 9. Referring to Fig. '9, the web ofiset press form com rises three printin I c'ouplesA, I B and C 0 which couples A an B are adapted to print on one side of the web W, while couple 0 prints a single color on the OPPOSltG side so as to perfect the web. The particu- 79 lar-Jiorr'n and arrangement of the printing couples and their connecting throw-off mechanisms for trippin the ress are not important and in themse ves 0 not constitute my invention. In Fig. .9 couples A .and B are built as a five -cylmder unit with form-cylinders D and E, transfer cylinders F and G and a'common impression cylinder H, all of I which are of equal dialmeter and are geared to-' gether to rotate in unison. Bower is. supplied to the press from the line shaft 110 carrying the bevel gear 111 meshing with the in,- I i termediate gear 112 connected with the gearing on the im ression cylinder H. The printing couple comprises the form cylinder I, transfer cylinder J and impression cylinder K, all of'like diameter and geared together to rotate in unison by. power derived through intermediate gear 113 connected with the imto the line shaft 110. 'The form cylinders D. E and I have suitable inking and water daml. ening mechanisms as shown, while the trans- 'fercylinders F, G and J and the impression cylinders H and K are all mounted in ecceh tric bearings provided with the usual throw- I I the press as well as to restore impression in t e customary manner b the operation of the trip-le ver 115 adjacent thetransfencylinder G. The trip-lever 115 is connected by link 116 to line I shaft 117 and the trip mechanism for printing couple C is connected by link 118 to line shaft, 117. The rockin of line shaft 117 when the ress is trippe simultaneously lowers the ro 109 connected with m in: roved delivery as hereinbefore described? T e web W (shown by dash and dot line) is fed to the press from the usual pilper roll R around the impression cylinder and. thence is led 'to printing couple C whereby the web W is perfected with two rs on one side and one'col- .dg e W is qllers until I e" left side of ,1 to be -11 advanced. through my improved web-stop-- I ping 'and webfo'r'wardi 'devices he'reinbefore described operating in conjunction with the cutting cylinders 14'and 15'. After the then passed printed web W has been severed into. sheets in the usual way.- I I I I The operation of my imiroved delivery in connection ,with the web 0 set press .shown in Fig. 9 is substantially as follows: Fig. 1 illus trates the position of'the various arts when .the press is in operationand the we W is "running freely over the idler roller 69 with the which canstill revolve in a clockwise direction but may not be reversely rotated. This mechlock wheels 74 and 75 raised to inoperative position, the web being pulled forwardly by the drop rollers 28 and 29 pressing the web W against the forwarding roller 24. .Such web V then drops down into the bite of the. cutting cylinders 14 and 15 which severs same into sheets that are then carried to the collecting cylinder L, folder M, and end delivery N as hereinbefore described. When the press is tripped the connecting rod 109 is lowered and pulls down the rock-arms and l 04 which are connected by the link 106. This movement of the rod'109 first takes up the lost motion connection (Fig. 1) between the arms 33, 34 and 37, 38 and thereafter compresses the springs 41, 42 and releasestne springs 89, 90, and then throws the drop rollers 28 and 29 out of contact with the forwarding roller 24:, but before these web advancing rollers become ineffective the lock wheels 74. and 75 are, by the same movement of the rod 109, brought down into contact with the idler roller 69 as shown in Fig. 4, and also the link 108 depresses the arm 107 of the control disk 73 so as to bring the pawl 71 into engagement with the ratchet 70 thereby preventing the idler roller 69 from. running backwardly or in anticlockwise direction. As shown in Fig. 4 the web W is held by the lock Wheels 7 4 and pressing same against the roller 69 anism is timed so that such lock wheels 74 and 75 come into contact with the web W and roller 69 before the drop rollers 28 and 29 actually let go; during this interval the ratchet 7 0 will permit the web WV automatically to run forwardly but not backwardly .with the locking portion of the web under the control of the web-stopping devices. By such 'means it will be seen that any tearing or crumpling of the web in the delivery is prevented nor does the webW back up or become misplaced with respect to the cutting cylinders 14 and 15 or the other sheet-manipulating mechanisms which continue in normal operation while the pressis trippedf When the impression is restored through the press with the raising of the rod 109 the lockwheels 7 4 and 75 with the idler roller; 69 do not interfere with the forward pulling of the web W through thepress and delivery as soon as the drop rollers 28 and 29 are brought back into web-feeding position (Fig. 1), since the pawl 71 has already been'raised from engagementwith the ratchet 7 0. When it is desired to move thedrop rollers 28 and 29 and lock wheels 74 and 75 to permanent inoperative position irrespective of'the tripping of the press on the restoration of impres-f sion by the reciprocating movements of the rod 109, the operator shifts the rock-arm 45 so that the pin plug end 51 shall engage the lower hole53 of the face plate 54 thereby swinging. the drop rollers 28 and '29 to the 7 In a delivery for web means foradvancing; the web through the I! 4 position.

- \Vhile the foregoing sets forth one embodiement of my invention, many changes in the structural details may be made without departing from the principles and scope'of the invention or sacrificing the chief advantages involved. I

I claim as my invention 1. In a delivery for web printing-presses, means for continuously advancing the web through the press an delivery, means for rendering said web-advancin 'means ineffective, means for stopping the forward feed of the web, and means for bringing said webstopping means into action before said webadvancing means becomes ineffective.

2. Ina deliveryfor web printing-presses, means for continuously advancing the web through the press and delivery, means for rendering said web-advancin means ineffective, means contacting wit 1 the web for stopping its forward feed,'and means for bringing said web-stopping means into action before said web-advancing means becomes ineffective.

said web-stopping means into action before said web-admiring means becomes ineffective. v

4(In' a delivery for web printing-presses, a trip mechanism ,for the press, means for advancing the web through the press and delivery, means for rendering said web-ad- 11' vancing means ineffective, means controlled by saidpress trip mechanism contacting with the web for stopping its forward feed, and means for bringing said web-stopping means into action before said web-advancing means becomes ineffective. p

5.- I n a delivery for web printing-presses, means for advancing the web through the press and delivery and. means rotatablein one direction only for preventing a backward movement of the web while permitting a forward run thereof. a

6. In a delivery for web printing-presses,

means for advancing the web through the press and delivery and separate means rotat- 12 able in one direction only for preventing a backward movement of the web while permitting a forward run thereof. p I

printing-presses,

press and delivery-and separate means rotatable in one direction only contacting with the web 'for preventing a backward movement of the web while permitting a forward run thereof. 8. In a delivery for web printing-presses, a trip mechanism for the press, means for advancing the web through the press and delivery, and means for preventing a backward movement of the web through the delivery while permit-ting its forward feed, both said means being controlled by said trip mecha nism,

9; In a delivery for webprinting-presses, a trip mechanism for the press, means for advancing the web through the press and delivery, and means for preventing a backward movement of the web through the delivery while permitting its forward feed, said means being controlled in reverse order by said trip mechanism.

10. In a delivery for web printing-presses, a trip mechanism for the press, means for advancing the web through the press and delivery, and separate means for preventing a backward movement of the web through the delivery while permitting its forward feed,

said means being controlled in reverse order by said trip mechanism. 11. In a delivery for web printing-presses, means for advancing the web through the press and delivery, means for rendering said web-advancing means inefiective, and means comprising coacting lock-wheels for preventing a backward movement of the web while permitting a forward run thereof irrespective of the action of said web-advancing means.

12. In a delivery for web printing-presses, a trip mechanism for the press, means for advancing the web through the press and delivery, means for rendering said web-advancing means ineffective, and means brought into action by said trip mechanism for preventing, a backward movement of the web while permitting a forward run thereof irrespective of the action of said web-advancing means.

13. In a delivery for web printing-presses, means for continuously advancing the web through the press and delivery, means for cutting the web into sheets beyond said webadvancing means, and means for rendering said web-advancing means ineffective while allowing the web-cutting means to continue in operation.

14. In a delivery for web printing-presses,

a trip mechanism for the press, means for advancing the web through the press and delivery, means for cutting the web into sheets beyond said web-advancing means, and means brought into action by said trip mechanism for rendering said webadvancing means ineffective and preventing a backward movement of the web While allowing the web-cutting means to continue in operation.

15. In a delivery for web printing-presses, a trip mechanism for the press, means for ad vancing the web through the press and delivery, means for cutting the web into sheets beyond said web-advancing means, means for preventing a backward movement of the web through the delivery while permitting its forward feed and continuing said webcutting means in operation, and operative connections between said trip mechanism and both the web-advancing means and the means for preventing a backward movement thereof.

16. In a delivery for web printing-presses, means for advancing the web through the press and delivery, means for preventing a backward movement of the web while permitting a forward runthereof, and means for placing either of said last-mentioned means in inopeartive position.

17. In a delivery for web printing-presses, means for advancing the web through the press and delivery, means for preventing a backward movement of the web while permitting a forward run thereof, and separate means for placing each of said last-mentioned means in inoperative position.

18. In a delivery for web printing-presses, a trip mechanism for the press, means for advancing the web through the press and delivery, means for preventing a backward movement of the web While permitting a for- Ward run thereof, both said means being controlledcby said trip mechanism, and means for placing either of said last-mentioned means in inoperative position irrespective of the action of saidpress trip mechanism.

19. In a delivery for web printing-presses, av trip mechanism for the press, means for advancing the web through the press and delivery, means for preventing a backward movement of the'web while permitting a forward run thereof, both said means being controlled by said trip mechanism, and separate means for placing each of said last-mentioned means in inoperative position irrespective of the action of said press trip mechanism.

CARL G, PRITCHARD. 

